Comtesse, it is very interesting and I think shows how many of us have disordered eating behaviour for a wide variety of reasons.
I was tested as part of a university research project to see if I had the genes that are more likely to incline you to be fat. You can have none of them, one of them or two of them. Those with two are more likely to be overweight & those with none are very unlikely to be overweight, with those with one showing a higher liklihood but less than those with the two genes. I had one gene.
So, there are definitely genetic tendencies.
There is also increasing evidence that those with messed up childhood attachments are more at risk of disordered eating. Julia Buckroyd has written a book about this, which is worth looking at if you have a childhood that was less secure than it should have been. I have so many issues there, that I could apply almost everything she wrote about to my eating habits.
There is also evidence that societal norms exert considerable pressure. The societal norms at the moment are still that slim is best and certainly when I was introduced to the wider world, magazines, advertisements, films etc back in the 1980s - slim was the only option.
Then there is the fact that never before in human history has an abundance of food been available. Never ever! We are truly human guinea pigs and who knows, global warming or the next ice age or something else, could mean it never happens again - but for now that is our reality.
So, take your pick - probably take a bit from all of it and that goes some way to explaining why we struggle.